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Chevy’s Mightiest Small-Block V8: the 1964-65 375 HP L84

Posted on December 10, 2025 by MCG

The most powerful of the first-generation small-block Chevy V8s was the L84 available in 1964-65 Corvettes, boasting 327 cubic inches and 375 horsepower. Let’s dig into the details. Continue reading →

Posted in Auto History, Technology | Tagged Chevrolet, Chevrolet Corvette, Chevrolet L84 V8, Chevrolet Small-Block V8

Piston Rings Saved Our Marriage: A 1937 Automotive Drama

Posted on August 19, 2025 by MCG

Excessive oil consumption in the family car is leading to this young couple’s financial ruin. Luckily, Perfect Circle piston rings are here to save the day. Continue reading →

Posted in Auto History, Technology | Tagged Perfect Circle Piston Rings

What Made the Hudson Hornet Engine So Great?

Posted on July 22, 2025 by MCG

In the early years of NASCAR, Hudson dominated the field with a lowly flathead six. Here’s our take on why such an unlikely engine worked so well. Continue reading →

Posted in Auto History, Motorsports, Technology | Tagged Hudson, Hudson 7X, Hudson Hornet, Hudson Instant Action, Hudson Motor Car Company, Hudson Twin-H

1939: Ford Finally Adopts Hydraulic Brakes

Posted on May 4, 2025 by MCG

Change often came at a leisurely pace at the Ford Motor Company in the ’30s, but in 1939 the company finally embraced hydraulic brakes. Continue reading →

Posted in Auto History, Technology | Tagged 1939 Ford, Ford, Ford hydraulic brakes, Henry Ford

The 1965 Kaehni Ignition Mystery

Posted on January 15, 2025 by MCG

In 1965, hot rodders were baffled by this ignition system with just one spark-plug wire to fire all eight plugs. How could that ever work? It did, and here’s how. Continue reading →

Posted in Auto History, Hot Rods, Technology | Tagged Economy Engine Company, Kaehni Ignition

Engine Knock and Pre-Ignition: A Beautiful Dynamic Animation

Posted on November 17, 2024 by MCG

Here’s a crystal-clear look at engine knock and pre-ignition in a beautifully done digital animation. Continue reading →

Posted in Technology | Tagged Engine knock, LSPI, Pre-ignition, Super Knock

About Gasoline

Posted on November 12, 2023 by MCG

If electric cars were commonplace today and we were studying gasoline as a possible alternative, some might consider it insane. Continue reading →

Posted in Technology

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Mac’s Motor City Garage

Here’s your source for industry news and gossip, automotive history, technology, racing, shop talk, hot rods, and collector car news.  All materials copyright, all rights reserved. Contact us at: mcg@macsmotorcitygarage.com

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